Fuel leak

[mark sexton]

I have a 71 240 ,I recently installed an electric fuel pump and removed the mech pump.the pump is working but since I installed it fuel is leaking from the banjo bolt on the float bowl of the carbon the left(closest to front). I cleaned the float but the problem persists.Any suggestions?,is this problem related to the new pump or just a coincidence?

[SteveJ]

What is the pressure of the fuel pump? The stock pump specs are 3.4 to 4.3 PSIG, so the electric fuel pump should provide a similar pressure.

[mark sexton]

holly 12v/7psi/97gph

[SteveJ]

I think we found your problem. 7PSIG>4.3PSIG. You need a pressure regulator downstream to use that fuel pump.

[mark sexton]

I was told that a regulator was not necessary,pump rec by motorsportsauto auto. what is in volved with adding a regulator

[beermanpete]

Steve is correct, you do need a regulator. However, the banjo fitting should not leak at only 7 psi. You may need to tighten it a bit more or replace the crush washers to get a better seal.

Installing the regulator is easy. We use a simple in-line regulator with the same Holley pump and it works fine. This type of pump does not cost much and should be available at most auto part stores.

[Reverend]

That banjo has very thin washers, but they make the difference. Mine squirted fuel like fountain without them.

[bartsscooterservice]

what's wrong with the mechanical pump anyhow?

[alternativez]

Be sure to check the torque on the banjo fitting. It should have a soft, probably brass, sealing washer on each side. Naturally, we tighten things to stop leaks, but banjo fitting faces can distort if too tight. Good luck.